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Finding the Fourth Proportional to 308,486.20, 425,707.92 and 172,518.58

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Solution

The fourth proportional to 308,486.20, 425,707.92 and 172,518.58 is: 238,073.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,486.20 : 425,707.92 = 172,518.58 : x
  2. Step 2: Convert to fraction form
    308,486.20/425,707.92 = 172,518.58/x
  3. Step 3: Cross multiply
    308,486.20x = 425,707.92 × 172,518.58
  4. Step 4: Simplify right side
    308,486.20x = 73,442,525,853.15
  5. Step 5: Solve for x
    x = 73,442,525,853.15/308,486.20
  6. Step 6: Final answer
    x = 238,073.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.